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   Articles with "electron ionization" as a keyword



Electron ionization mass spectrometry: Quo vadis?

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recommendations! Published in 2022 at "ELECTROPHORESIS"

DOI: 10.1002/elps.202100392

Abstract: Mass spectrometry (MS) is a fundamental technique to identify compounds by their mass‐to‐charge ratio. It is known that MS can only detect target compounds when they are converted to ions in the gas phase. The… read more here.

Keywords: mass spectrometry; ionization; technique; electron ionization ... See more keywords

Electron Attachment and Electron Ionization of Formic Acid Clusters Embedded in Helium Nanodroplets

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recommendations! Published in 2019 at "Journal of the American Society for Mass Spectrometry"

DOI: 10.1007/s13361-018-02124-z

Abstract: AbstractWe report the results of an experimental study of electron ionization of large helium nanodroplets doped with formic acid (FA). Several homologous series of cluster anions are observed, including [FAn-H]−, undissociated FAn−, and these ions… read more here.

Keywords: electron attachment; acid clusters; formic acid; electron ionization ... See more keywords

Discrimination of seized drug positional isomers based on statistical comparison of electron-ionization mass spectra

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recommendations! Published in 2020 at "Forensic Chemistry"

DOI: 10.1016/j.forc.2020.100261

Abstract: Abstract Positional isomers of novel psychoactive substances (NPS) present challenges in seized drug identification given the high degree of similarity in the resulting electron-ionization (EI) mass spectra. In this work, a previously developed method, which… read more here.

Keywords: positional isomers; mass spectra; mass; electron ionization ... See more keywords

Rapid Approximate Subset-Based Spectra Prediction for Electron Ionization–Mass Spectrometry

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recommendations! Published in 2023 at "Analytical Chemistry"

DOI: 10.1021/acs.analchem.2c02093

Abstract: Mass spectrometry is a vital tool in the analytical chemist’s toolkit, commonly used to identify the presence of known compounds and elucidate unknown chemical structures. All of these applications rely on having previously measured spectra… read more here.

Keywords: mass spectrometry; prediction electron; electron ionization; prediction ... See more keywords

Quantum Chemistry-Based Prediction of Electron Ionization Mass Spectra for Environmental Chemicals

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recommendations! Published in 2024 at "Analytical Chemistry"

DOI: 10.1021/acs.analchem.4c02589

Abstract: There is a lack of experimental electron ionization high-resolution mass spectra available to assist compound identification. The in silico generation of mass spectra by quantum chemistry can aid annotation workflows, in particular to support the… read more here.

Keywords: environmental chemicals; chemistry; mass spectra; electron ionization ... See more keywords

MWFormer: Estimation of Molecular Weights from Electron Ionization Mass Spectra for Improved Library Searching.

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recommendations! Published in 2024 at "Analytical chemistry"

DOI: 10.1021/acs.analchem.4c03781

Abstract: Molecular weight (MW) is a crucial property to improve the accuracy of multidimensional compound identification. In this study, we have developed MWFormer, a novel method that predicts MWs solely from spectra of electron ionization mass… read more here.

Keywords: compound identification; mwformer; ionization mass; electron ionization ... See more keywords

Gas Analysis by Electron Ionization Combined with Chemical Ionization in a Compact FTICR Mass Spectrometer.

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recommendations! Published in 2018 at "Analytical chemistry"

DOI: 10.1021/acs.analchem.8b01107

Abstract: In this Article, a compact Fourier transform ion cyclotron resonance (FTICR) mass spectrometer based on a permanent magnet is presented. This instrument has been developed for real-time analysis of gas emissions. The instrument is well-suited… read more here.

Keywords: analysis; gas; fticr mass; electron ionization ... See more keywords
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Cold Electron Ionization (EI) Is Not a Supplementary Ion Source to Standard EI. It is a Highly Superior Replacement Ion Source.

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recommendations! Published in 2021 at "Journal of the American Society for Mass Spectrometry"

DOI: 10.1021/jasms.1c00241

Abstract: GC-MS usually employs a 70 eV electron ionization (EI) ion source, which provides mass spectra with detailed fragment ion information that are amenable for library search and identification with names and structures at the isomer… read more here.

Keywords: ion source; electron ionization; standard; ion ... See more keywords

High-Resolution Electron Ionization Mass Spectrometry of Stannane: Deconvolution of Superimposed Fragmentation Patterns.

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recommendations! Published in 2024 at "Journal of the American Society for Mass Spectrometry"

DOI: 10.1021/jasms.4c00123

Abstract: In a pulsed laser plasma driven extreme ultraviolet (EUV) light, tin droplets undergo evaporation, eventually depositing on different surfaces. The removal of surface bound tin is commonly achieved with a hydrogen plasma, resulting in the… read more here.

Keywords: mass; stannane; resolution electron; high resolution ... See more keywords

Unusual Fragmentations of Silylated Polyfluoroalkyl Compounds Induced by Electron Ionization

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recommendations! Published in 2025 at "Journal of the American Society for Mass Spectrometry"

DOI: 10.1021/jasms.5c00185

Abstract: Per- and polyfluoroalkyl substances (PFAS) are environmentally persistent compounds that present analytical challenges due to their stability and low concentrations. In this study, electron ionization (EI) mass spectra of trimethylsilyl (TMS) derivatized fluorinated alcohols and… read more here.

Keywords: silylated polyfluoroalkyl; fragmentations silylated; unusual fragmentations; ionization ... See more keywords

Carbene-based Difluoromethylation of Bisphenols: Application to the Instantaneous Tagging of Bisphenol A in Spiked Soil for Its Detection and Identification by Electron Ionization Gas Chromatography-Mass Spectrometry

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recommendations! Published in 2019 at "Scientific Reports"

DOI: 10.1038/s41598-019-53735-9

Abstract: The rapid and efficient difluoromethylation of a panel of eleven bisphenols (BPs) for their enhanced detection and identification by Electron-Ionization Gas Chromatography-Mass Spectrometry (EI-GC-MS) is presented. The derivatization employs the inexpensive, environmentally benign agent diethyl… read more here.

Keywords: detection; electron ionization; ionization gas; detection identification ... See more keywords